Add 'autoplay' content settings and expose it to Blink.

third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 284 matching lines @@
 }
 
 bool FrameLoaderClientImpl::allowRunningInsecureContent(bool enabledPerSettings, SecurityOrigin* context, const KURL& url)
 {
     if (m_webFrame->contentSettingsClient())
         return m_webFrame->contentSettingsClient()->allowRunningInsecureContent(enabledPerSettings, WebSecurityOrigin(context), WebURL(url));
 
     return enabledPerSettings;
 }
 
+bool FrameLoaderClientImpl::allowAutoplay(bool defaultValue)
+{
+    if (m_webFrame->contentSettingsClient())
+        return m_webFrame->contentSettingsClient()->allowAutoplay(defaultValue);
+
+    return defaultValue;
+}
+
 void FrameLoaderClientImpl::didNotAllowScript()
 {
     if (m_webFrame->contentSettingsClient())
         m_webFrame->contentSettingsClient()->didNotAllowScript();
 }
 
 void FrameLoaderClientImpl::didNotAllowPlugins()
 {
     if (m_webFrame->contentSettingsClient())
         m_webFrame->contentSettingsClient()->didNotAllowPlugins();
@@ skipping 737 matching lines @@
         return nullptr;
     return m_webFrame->client()->frameBlameContext();
 }
 
 LinkResource* FrameLoaderClientImpl::createServiceWorkerLinkResource(HTMLLinkElement* owner)
 {
     return ServiceWorkerLinkResource::create(owner);
 }
 
 } // namespace blink